JPH07288648A - Facsimile equipment - Google Patents

Abstract

PURPOSE:To relieve a load of data counts in the case of reading an original and to prevent occurrence of read interruption or transmission error. CONSTITUTION:A counter circuit 113 is provided to a control unit to allow the counter circuit 113 to generate a start pulse SP and a start/end command Si. Thus, in the case of reading at least an original of A4 size, it is not required to count image data to set a read start timing and a timing for data storage processing start and end, the load of a CPU is relieved, data storage processing is smoothly executed and read interruption or a transmission error caused by a full memory capacity of a read buffer is prevented. Moreover, since the allowable time for compression coding processing is extended, the compression coding processing and transmission control are smoothly executed and the total transmission time is reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facsimile machine, and more particularly to an improved technique for setting a reading start timing and an image data processing start / end timing.

[0002]

2. Description of the Related Art Conventionally, in a normal facsimile apparatus, an original is read by a reading device including a reading head formed of a CCD (charge coupled device) having a large number of light receiving elements, and the read image signal is binarized. It is converted to binary image data by the circuit and stored in the reading buffer.
The image data stored in the reading buffer is converted into compressed image data which is compressed and encoded by the microcomputer in the control unit of the facsimile machine and stored in the transmission buffer, and the compressed image stored in the transmission buffer The data is transmitted to the facsimile machine on the other side via the communication line.

The reading head reads a document in a line shape in the paper width direction by a CCD having 2500 light receiving elements, for example, and the paper width of a B4 size document having the maximum paper width corresponds to 2048 light receiving elements. , A4 size document width corresponds to 1728 light receiving elements. Normally, when scanning and sending a document, a B4 size document (B
4 originals) and A4 size originals (A4 originals) with the center of the paper width substantially aligned with the center of the reading head.
It is designed to be set in a facsimile machine.

In the above case, which will be described with reference to FIG. 8, when reading a document, the 2500 light receiving elements of the reading head are synchronized with the clock signal CLK of a predetermined frequency for each scan (each raster). Although the document is sequentially read from one end side, the reading is started when a start pulse SP for instructing the reading start is supplied to the reading head from the microcomputer, and the reading is started by the control program inside the microcomputer. The data storing process of the image data into the reading buffer is started at the rising edge of the start / end command Si to be created, and the data storing process is ended at the falling edge of the start / end command Si. That is, only the image data read from the rising edge to the falling edge of the start / end command Si is stored in the reading buffer, and the compression encoding processing is performed.

[0005]

The above-mentioned start pulse S
Since P and the start / end command Si are originally set with reference to the B4 original having the maximum paper width, there is no particular problem when reading the B4 original. However, when reading the A4 original, if the reading is started based on the illustrated start pulse SP, the image data read during 160 CLK corresponding to 1/2 of the difference in the paper width between the B4 original and the A4 original is
Since the data is invalid, the microcomputer
After the reading is started, the image data is counted, after the 160 invalid data are counted, the data storing process of the image data into the reading buffer is started, and thereafter the 1728 image data is counted, and the data processing is performed at the time of the data processing. After finishing, and after counting 160 invalid data,
The image data compression encoding process is started.

As described above, when the A4 original is read and transmitted, in addition to the data storage process of the image data in the read buffer, the compression encoding process, and the transmission control, the microcomputer detects invalid data and image data. The load on the CPU of the microcomputer increases as much as the count is executed, and because the compression encoding processing time is short, the processing capacity for compressing the data from the read buffer and transferring it to the transmission buffer decreases, and as a result, the read There is a problem that read interruption (transmission error) or the like due to the buffer full memory is likely to occur. The present invention has been made to solve the above problems, and an object of the present invention is to provide a facsimile apparatus which can reduce the load of data count when reading a document and which does not cause reading interruption or transmission error.

[0007]

In order to achieve the above object, a facsimile apparatus according to a first aspect of the present invention has a reading head including a plurality of reading elements arranged in a line in the paper width direction of an original document. For each raster, a plurality of reading elements sequentially read the document from one end side of the document in synchronization with a clock signal, and a reading unit that reads the document.
A read buffer for storing the binarized image data, an image data encoding means for compressing the image data received from this read buffer, a transmission buffer for storing the compressed image data received from this image data encoding means, and this transmission A facsimile apparatus having a transmitting means for transmitting and outputting compressed image data received from a buffer via a communication line, and detecting whether a document having a first paper width or a document having a second paper width narrower than the first paper width. Detecting means, counting means for counting the clock signal from "0" to "total number of reading elements-1" for each raster, and outputs to the reading means for receiving the outputs of the detecting means and the counting means. ,
Image data storage processing for reading the original of the first paper width to the reading buffer while setting and issuing the reading start timing when reading the original of the first paper width and the reading start timing when reading the original of the second paper width And a timing setting means for setting and instructing the start and end timings and the start and end timings of the image data storage processing when reading the original of the second paper width.

Here, the timing setting means outputs a first signal when the count value of the counting means is a predetermined small first count value, and a count number corresponding to the second paper width in the first count value. The second signal is added when the second count value is added, the third signal is added when the count number corresponding to the first paper width is added to the first count value, and the third signal is added when the count value corresponding to the first paper width is added. A count value detecting means for outputting a fourth signal when a fourth count value obtained by subtracting a count number corresponding to 1/2 of the paper width difference from the maximum count value, and an output of the detecting means and the count value detecting means are received. ,
When reading a document having a first paper width to the reading means, a reading start command signal is output when the first signal is input,
Further, when reading the original of the second paper width, the original of the first paper width is read by receiving the reading start command means for outputting the reading start command signal at the time of inputting the fourth signal and the output of the detecting means and the count value detecting means. Occasionally, the process of storing image data in the reading buffer is started when the first signal is input, the process of storing the image data is ended when the third signal is input, and the first signal is input when the original having the second paper width is read. It may be configured to include a data processing start / end command means for starting the image data storage processing to the reading buffer at the time of input and ending the image data storage processing at the time of inputting the second signal (depending on claim 1). Claim 2).

[0009]

In the facsimile apparatus according to the first aspect of the present invention, the reading head of the reading means is provided with a plurality of reading elements arranged in a line in the paper width direction of the document, and each reading means For each raster, a plurality of reading elements sequentially reads the original from one end side of the original in synchronization with the clock signal. The read buffer stores the binarized image data, the image data encoding means compresses the image data, the compressed image data is stored in the transmission buffer, and the transmitting means transmits the compressed image data via the communication line. And output it.

The detecting means is a document of the first paper width or the first paper width.
It is detected whether the original has a second paper width narrower than the paper width. The counting means sets the clock signal to "0" for each raster.
To "total number of read elements-1". The timing setting means receives the outputs of the detecting means and the counting means, and sets the reading start timing for reading the original of the first paper width and the reading start timing for reading the original of the second paper width to the reading means. Along with the command, the start and end timings of the image data storage processing when reading the original of the first paper width and the start and end timings of the image data storage processing when reading the original of the second paper width are set in the reading buffer. Order.

Further, in the facsimile apparatus of the second aspect, the timing setting means includes a count value detecting means, a reading start commanding means, and a data processing start / end commanding means. The count value detecting means outputs a first signal when the count value of the counting means is a predetermined small first count value, and a second value obtained by adding a count number corresponding to the second paper width to the first count value. A second signal is output when the count value is reached, and a third signal is output when the count value is the third count value obtained by adding the number of counts corresponding to the second paper width to the first count value. The fourth signal is output at the fourth count value obtained by subtracting the count number corresponding to 1/2 of the paper width difference from the maximum count value.

The reading start commanding means receives the outputs of the detecting means and the count value detecting means, and outputs a reading start commanding signal to the reading means at the time of inputting the first signal when reading the original having the first paper width. Also, when reading a document of the second width, a reading start command signal is output when the fourth signal is input.

The data processing start / end command means is
Upon receiving the outputs of the detection means and the count value detection means, when reading the original of the first paper width, the process of storing the image data in the reading buffer is started when the first signal is input, and
When the third signal is input, the storage process of the image data is ended, and when the document of the second paper width is read, the storage process of the image data in the read buffer is started when the first signal is input, and at the same time when the second signal is input. The storage process of the image data is ended.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 and 2, the main body 2 of the facsimile apparatus 1 includes a container-shaped lower cover 3, an upper cover 4 that covers the lower cover 3, and a frame (not shown) disposed inside them. Is equipped with. A handset 5 is attached to the lower cover 3. In the lower cover 3, a recording paper cassette 21 capable of accommodating a large number of recording papers 22 made of standard cut paper is set. In addition to the main body 2, the facsimile device 1 includes a control panel 6, a recording device 20 for recording on a recording paper 22 with a recording head 25 via an ink ribbon 27, and a line for line-feeding the recording paper 22 and the ink ribbon 27. It is provided with a feeding device 30, a document feeding device 50 for feeding a document 51, an image reading device 80 for reading an image of the document 51, a control unit 100 for controlling the facsimile device 1, and the like.

First, the recording device 20, the recording paper cassette 21, and the line feed device 30 will be described with reference to FIG. The recording paper 22 is fed one by one from the recording paper cassette 21 by the paper feed roller 31, and then sent to the recording device 20 by the line feed device 30 to record images such as characters and figures. Line feed device 3
0 is a paper feed roller 31, a paper guide 32, a pair of feed rollers 33, a platen 34, a pair of paper discharge rollers 35, a pair of paper guides 36, and a paper discharge tray 3
8 and the like, and these paper feed roller 31 and feed roller 3
3, the platen 34, and the discharge roller 35 are the LF motor 4
0 (see FIG. 5) is rotationally driven via a gear system (not shown). Recording paper 2 delivered from recording paper cassette 21
The leading edge of 2 is detected by the recording sheet leading edge sensor 24,
The recording start timing of the recording device 20 is determined based on the detection signal. The recording paper size detection sensor 23 detects the type of the recording paper cassette 21 installed in the facsimile apparatus 1 among the recording paper cassettes 21 prepared for the various recording papers 22 having different sizes, and outputs the detection result. Based on this, the size of the recording paper 22 is determined.

The recording device 20 is provided in the upper cover 4,
This recording device 20 is a recording head controller 1 shown in FIG.
Recording head 25 controlled by 8 and recording head 25
A platen 34 rotatably provided at a position facing the
And an ink ribbon cassette 26. The recording head 25 is composed of a thermal head having a large number of heating elements arranged in a line in a direction orthogonal to the feeding direction of the recording paper 22, and a large number of heating elements are selected based on a signal supplied to the recording head controller 18. Be heated. Platen 3
The LF motor 40 is driven to rotate about the center line by a LF motor 40 through a gear system (not shown) to line feed the recording paper 22 and the ink ribbon 27. The ink ribbon cassette 26 has a heat-sensitive ink ribbon 27 having a width corresponding to the recording range of the recording head 25.
The recording head 2 is supplied from the supply side ribbon roll 27a.
The take-up shaft 27b is wound up between the plate 5 and the platen 34, and the take-up shaft 27b is rotationally driven by the LF motor 40 in the take-up direction via a gear system. The ink ribbon 27 is line-fed in synchronism with the recording paper 22, but an image is formed on the recording paper 22 by feeding the ink ribbon 27 and the recording paper 22 and pressing the ink ribbon 27 onto the recording paper 22 by the recording head 25. Will be recorded.

The recording paper 22 on which an image has been recorded is guided by a paper guide 36 and sent to a discharge tray 38,
It is discharged to the outside of the device. The recording paper discharge sensor 37 detects the discharge of the recording paper 22, and when recording is continuously performed on a plurality of sheets, it is detected by the recording paper discharge sensor 37 that the recording paper 22 on which the image is recorded is completely discharged. Then, the control unit 100, which will be described later, controls the line feed device 30 so that the feeding of the next recording paper 22 from the recording paper cassette 21 is started, thereby avoiding the paper jam.

Next, the document feeding device 50 and the image reading device 80 will be described with reference to FIG. Inside the upper cover 4, a document feeding device 50 and an image reading device 80 for reading an image recorded on the document 51 are provided.
The original 51 is placed on an original receiver 52 which is detachably attached to the upper cover 4, and is set between a pair of original guides 53 shown in FIG.
Detected by the pair of feed rollers 55,
The document is fed to the document reading position of the image reading device 80 by a document feeding device 50 including a paper guide 56 and a pair of feed rollers 57. In addition, B set on the document receiver 52
First original sensor 61 for detecting four originals and original receiver 52
Second document sensor 62 for detecting the A4 document set on the
Are provided (see FIG. 6). The rollers 55, 57
Is rotated by a reading motor 60 (see FIG. 5) via a gear system. The reading motor 60 is drive-controlled by the control unit 100.

The image reading apparatus 80 includes a light source 81 as a light emitting body, a lens 82, mirrors 83 and 84, and a charge coupled device (hereinafter, CC) having a plurality of light receiving elements as light receiving bodies.
The light source 81 irradiates the original 51 with light, the reflected light from the original 51 is condensed by the lens 82, and then reflected by the mirrors 83 and 84 to be reflected by the CCD 85. The light is received and the image on the original 51 is read line by line. A pixel is the smallest unit that constitutes an image, and is an area (area) on the original 51 that is read by one light receiving element of the CCD.

The size of one pixel is determined by various factors such as the size of the light receiving element, the positions and angles of the mirrors 83 and 84, the position of the lens 82 and the focal length.
, The size in the main scanning direction is 0.13 mm
The size in the sub-scanning direction is determined by the feed amount of the document 51 while the image reading device 80 reads one line of the image. In this facsimile device 1, the feed amount of the document 51 is 0.26 mm,
0.13 mm and 0.065 mm are selectable, and the size (area) of one pixel when each of these feed amounts is selected is 0.13 mm × 0.26 mm,
0.13 mm x 0.13 mm, 0.13 mm x 0.06
It becomes 5 mm. As the feed amount becomes smaller, the area of one pixel becomes smaller and the resolution becomes higher.

The light receiving element of the CCD 85 is a photoelectric conversion element that outputs a voltage according to the intensity of the received reflected light. Image data obtained by converting a signal representing the magnitude of this output voltage into digital data is used by the control unit 100. And the binarized image data is created from the image data. B4
In this facsimile device 1 capable of reading a document of a size, the CCD 85 is composed of 2500 light receiving elements arranged in a line in the paper width direction of the document 51. The leading edge of the document 51 is detected by the document leading edge sensor 58, the reading of the document 51 is started after the detection signal is input, and after the reading, the document 51 is discharged from the opening 59 to the outside.

As shown in FIG. 3, an operation panel 6 is provided on the upper cover 4, a liquid crystal display 7 is provided at a rear portion of the operation panel 6, and a keyboard 8 is provided at a front portion and a central portion of the operation panel 6. Is provided. Numeric keypad 9 is on the left side of the keyboard 8, and copy key 10 and start key 11 are on the right side.
However, various keys such as a memory key 12, a function key 13, a set key 14, cursor keys 15 and 16 are provided in the central portion. The copy key 10 is a key for instructing copying of a document and also for initiating copying, and the start key 11 is a key for instructing the start of various processing operations. The function key 13 is a key for instructing display disclosure of various functions that can be executed, and the function is selected by operating the ten-key 9 or the cursor keys 15 and 16. The set key 14 is a key for instructing selection confirmation, and the memory key 12 is a key for instructing selection of memory transmission.

Next, the control system of the facsimile apparatus 1 will be described with reference to FIGS. As shown in FIG. 4, a control unit 100 for controlling the facsimile apparatus 1
Is a communication line 15 connected to the partner device 16, a control panel 6, a display controller 17 for controlling the display 7, a recording head controller 18 for controlling the recording head 25, the various sensors and switches, the light source 81, and the LF.
Are connected to the reading motor 40 and the reading motor 60, respectively. As shown in FIG. 5, the control unit 100 includes a CP
There is provided a microcomputer including a U 101, a ROM 102 that stores a plurality of control programs for controlling the facsimile apparatus 1, and a RAM 103. R
In the AM 102, a read buffer 104 that stores image data read by the image reading device 80 and binarized, and compression-coded image data (hereinafter referred to as compressed image data) for transmission via the communication line 15 are temporarily stored. A memory area such as a transmission buffer 105, a reception buffer 106 for temporarily storing compressed image data received via the communication line 15, a recording buffer 107 for temporarily storing image data obtained by decoding the received compressed image data Is provided.

The microcomputer 10 includes a bus 10
S / P conversion circuit 109 for converting a serial signal into a parallel signal, a threshold value memory 110, a P / S conversion circuit 117 for converting a parallel signal into a serial signal, and a transmission / reception connected to the communication line 15 MODEM 114, motors 40, 6
The drive circuits 115 and 116 for 0 are connected.
The control unit 100 further includes a clock signal generation circuit 109, CC for generating a clock signal of a predetermined high frequency.
A binarizing circuit 112, a counter circuit 113, which binarizes the image signal received from D85 and converts it into binarized image data,
Etc. are provided. In FIG. 5, circuits and devices not directly related to the present invention are omitted.

The binarizing circuit 112 converts the image signal read by the CCD 85 and converted into a digital signal into binarized image data.
5, the threshold value data is supplied from the threshold value memory 110, and the binarization circuit 112 compares the image signal with the threshold value data to obtain a binarized image. Create the data. Binary image data is created by setting 0 (white) when the level of the image signal is higher than the threshold value and 1 (black) when it is low. When the binarized image data for one line (one raster) is created, the image data is S / P.
After being converted into parallel image data by the conversion circuit 109, it is stored in the read buffer 104. Threshold memory 110
Stores threshold value data and supplies the threshold value data to the binarization circuit 112 based on a command from the CPU 101.

The clock signal output from the clock signal generation circuit 109 is the CCD 85 and the counter circuit 1.
13 and the S / P conversion circuit 109. The counter circuit 113 includes a first document sensor 61 for detecting a B4 document and a second document sensor 62 for detecting an A4 document.
And are connected. The first original sensor 61 outputs a detection signal of “H” level when the B4 original is set in the original receiver 52, and the second original sensor 62 has the A4 original set in the original receiver 52. At the same time, an "H" level detection signal is output.

The counter circuit 113 outputs a start pulse SP to the CCD 85 for instructing the start of reading for each line, and also causes the CPU 101 to store the image data in the reading buffer 104 (hereinafter A start / end command Si for instructing the start and end of (data storage processing) is output. However, this will be described later with reference to FIG. P / S conversion circuit 117
Is for converting a parallel signal into a serial signal. The received image data processed in parallel by the microcomputer is converted into serial image data and supplied to the recording head controller 18.

In the ROM 102, the image data obtained by reading the original 51 and binarizing it is read in the buffer 1.
04, a data storage processing control program stored in 04, a compressed data processing control program for converting the image data stored in the read buffer 104 into compressed image data and storing the compressed image data in the transmission buffer 105, and the partner device 16 via the communication line 15. And a decoding processing control program for decoding the compressed image data that is received from the storage buffer 106 and temporarily stored in the reception buffer 106, converting it into image data, and storing it in the recording buffer 107. Next, the counter circuit 113 will be described with reference to FIG. Counter circuit 113
Is the clock signal CL from the clock signal generation circuit 109.
A counter 120 that receives K and counts from “0” to “2499”, a detection circuit 121 for detecting “0”, and a “1”
"727" detection detection circuit 122, "2047" detection detection circuit 123, and "2339" detection detection circuit 124
The relay type contacts 125 and 126, the Si signal generating circuit 127, the SP signal generating circuit 128 and the like.

Each of the detection circuits 121, 122, 123,
The counters 124 are respectively connected to the counter 120 by a bus, and these detection circuits 121, 122, 123, 12 are connected.
4 indicates that the count value of the counter 120 is “0”, “172”.
When "7", "2047", and "2339", one pulse signal is output respectively. Paper width of B4 original is 2
It corresponds to 048 pixels (2048 light receiving elements) and can read each line of the B4 document while the counter 120 is counting from “0” to “2047”.
Document width is 1728 pixels (1728 light receiving elements)
Accordingly, each line of the A4 original can be read while the counter 120 counts from “0” to “1727”.

The output terminal of the "0" detection detection circuit 121 is connected to the Si signal generation circuit 127 and one input terminal of the contact 126. The output terminal of the “1727” detection detection circuit 122 is connected to one input terminal of the contact 125. The output terminal of the “2074” detection detection circuit 123 is connected to the other input terminal of the contact 125. The output terminal of the “2339” detection detection circuit 124 is
It is connected to the other input terminal of the contact 126. The common terminal of the contact 125 is connected to the input terminal of the Si signal generating circuit 127, and when the first document sensor 61 detects the B4 document, the contact 125 is switched to the other input terminal side, and When the 2 document sensor 61 detects an A4 document, it is switched to one input terminal side.

The common terminal of the contact 126 is connected to the input terminal of the SP signal generating circuit 128.
When the first document sensor 61 detects a B4 document, it is switched to one input terminal side, and when the second document sensor 61 detects an A4 document, it is switched to the other input terminal side. ing. The Si signal generation circuit 127 includes, for example, a flip-flop,
It rises with the pulse signal from the detection circuit 121, and
The CPU 101 is supplied with a start / end command Si that causes a fall with a pulse signal from the detection circuit 122 or 123. When reading a B4 original, the start / end command Si is
It rises when the count value is "0" and falls when the count value is "2047". When reading an A4 original, the start / end command Si rises when the count value is "0" and falls when the count value is "1727".

The SP signal generating circuit 128 is composed of a circuit or a pulse generating circuit which is composed of a simple conductor wire which outputs one pulse signal when one pulse signal is inputted,
When the B4 original is read, the start pulse SP is output to the CCD 85 when the count value is "0", and when the A4 original is read, the start pulse SP is started when the count value is "2339". Pulse SP is CCD8
It is output to 5.

Next, the operation of the facsimile apparatus configured as described above will be described with reference to the time chart of FIG. When the original 51 is set and the original is read and transmitted, when the start pulse SP is input from the counter circuit 113, the CCD 85 starts reading the original, and for each line, in synchronization with the clock signal CLK. The image reading is sequentially performed from the 0th light receiving element to the 2499th light receiving element corresponding to the reading start end side of the document 51, and the image signal is output to the binarization circuit 112.

When reading the original 51, the microcomputer stores a read image data in the read buffer 104 when the start / end command Si supplied from the counter circuit 113 rises for each line. When the start end command Si falls, the data storage processing is ended. That is, since the time required to store the individual image data is a minute time, the microcomputer reads only the image data read during the period from the rising edge to the falling edge of the start / end command Si and reads out the buffer. It will be stored in 104.

Here, when reading a B4 original, at the timing t1 when the count value is "0", the start pulse SP is output and the start / end command Si rises, so that the image is read at the timing t1. The data storage processing is started, and at the timing t3 when the count value is “2047”, the data storage processing ends. Then, the image data stored in the reading buffer 104 by the data storage process during that time is compression-encoded by the compression encoding process from the timing t3 to the timing t5 when the count value becomes “2499”, and the MODEM 114 is sequentially stored. It will be transmitted and output via.

On the other hand, when the A4 original is read, the start pulse SP is advanced at the timing t4 which is advanced from the timing t1 by the count "160" which is ½ of the difference between the width of the B4 original and the width of the A4 original. Is output, the image reading is started at the timing t4. Then, at the timing t1, the start / end command Si
Therefore, the data storage process in the read buffer 104 is started at the timing t1, and the data storage process is ended at the timing t2 when the count value is “1727”. Then, the image data stored in the read buffer 104 by the data storage process during that time is compression-encoded by the compression encoding process from the timing t2 to the timing t5, and sequentially MOD.
It will be transmitted and output via the EM 114.

As described above, the control unit 100 is provided with the counter circuit 113, and the counter circuit 113 is configured to generate the start pulse SP and the start / end command Si. At the time of reading, it is not necessary to count the image data in order to set the read start timing and the start and end timings of the data storage processing, so the load on the CPU 101 of the microcomputer is reduced. As a result, the data storage process can be smoothly executed, and the read interruption or the transmission error due to the memory full of the read buffer 104 can be eliminated, and the allowable period of the compression encoding process is a sufficient period from the timing t2 to the timing t5. Since the compression coding process and the subsequent transmission control can be smoothly performed, the total transmission time can be shortened.

Correspondence between each claim and the constituent elements in the above embodiment will be briefly described. The one corresponding to the reading head is the CCD 85, the one corresponding to the reading element is the light receiving element, the one corresponding to the reading means is the reading device 80, and the one corresponding to the image data encoding means is the microcomputer (in particular, the compressed data processing of the ROM 102). Control program), transmitting means corresponds to the microcomputer and MODEM 114, and detecting means corresponds to the first document sensor 61 and the second document sensor 62.
Is. Counter 12 is equivalent to the counting means.
0, which corresponds to the timing setting means, is the detection circuits 121 to 124 of the counter circuit 113 and the contacts 125 and 1.
26, the Si signal generating circuit 127, and the SP signal generating circuit 128, which correspond to the count value detecting means,
The detection circuits 121 to 124, which correspond to the read start instruction means, are the SP signal generation circuit 128, and the one which corresponds to the data processing start / end instruction means are the Si signal generation circuit 127. Further, the values corresponding to the first count value, the second count value, the third count value, and the fourth count value are "0", "1727", "2047", and "2", respectively.
339 ".

In the above embodiment, the case where the first light receiving element of the CCD 85 and the edge on the reading start side of the B4 document coincide with each other has been described as an example for simplification of description. Is provided with a plurality of light receiving elements (this number is referred to as a) protruding outside the edge on the reading start side of the B4 document, the timing t2 is t2 = a + 1.
727, the timing t3 may be set to t3 = a + 2047, respectively. In this case, an “a + 1727” detection detection circuit is provided instead of the “1727” detection detection circuit 122, and an “a + 2047” detection detection circuit is provided instead of the “2047” detection detection circuit 123. become.

[0040]

As described above in detail, in the facsimile apparatus according to the first aspect, in addition to the reading means, the reading buffer, the image data coding means, the transmission buffer and the transmitting means, the detecting means and the counting means. Means and timing setting means are provided, and the timing setting means causes the reading means to start reading the original of the first paper width,
When the reading start timing of the document of the second paper width is set and instructed, the timing of starting and ending the image data storage in the reading buffer when reading the document of the first paper width, and the timing of reading the document of the second paper width Since the start and end timings of storing the image data in the reading buffer are set and instructed, the start and end timings of the storing of the image data in the reading buffer are determined especially when reading the original of the second width. Therefore, it is not necessary to count the image data, so that the load is reduced and the reading of the original document, the image data processing, and the image data transmission in the facsimile apparatus can be smoothly performed.

Further, in the facsimile apparatus according to the present invention, the timing setting means includes a count value detecting means, a reading start instruction means, and a data processing start / end instruction means, and the original having the first paper width is read. At the time of reading, the reading is started at the timing of a predetermined small first count value, the storage process of the image data in the read buffer is started, and the count number corresponding to the first paper width is added to the first predetermined value. The image data storage process is configured to end at the timing of the third count value, and when reading a document having the second paper width, half the difference between the first paper width and the second paper width is read.
The reading is started at the timing of the fourth count value obtained by subtracting the count number corresponding to from the maximum count value, and the processing of storing the image data in the reading buffer is started at the timing of the first count value to set the first count value. Second
The image data storage processing ends at the timing of the third count value obtained by adding the count number corresponding to the paper width.

In this way, by advancing the reading start timing of the document of the second paper width by the count number corresponding to 1/2 of the difference between the first paper width and the second paper width, the image data of the document of the second paper width can be obtained. Since the start timing of the storing process in the reading buffer can be matched with the start timing of the storing process of the image data of the original of the first paper width in the reading buffer, the time for compressing the image data of the original of the second paper width. Can be lengthened, and as a result, transmission errors due to memory fullness of the read buffer are less likely to occur. The other effects are the same as in claim 1.

[Brief description of drawings]

FIG. 1 is a perspective view of a facsimile apparatus according to an embodiment of the present invention.

FIG. 2 is a vertical sectional side view of the facsimile device.

FIG. 3 is a plan view of an operation panel of the facsimile device.

FIG. 4 is a block diagram of a control system of the facsimile device.

FIG. 5 is a block diagram of a main part of a control unit of the control system.

FIG. 6 is a configuration diagram of a counter circuit of the control unit.

FIG. 7 is a time chart of various signals based on the control of the control unit.

FIG. 8 is a view corresponding to FIG. 7 according to a conventional technique.

[Explanation of symbols]

 1 Facsimile device 80 Original reading device 85 CCD 100 Control unit 101 CPU 102 ROM 103 RAM 104 Reading buffer 105 Transmission buffer 61 First original sensor 62 Second original sensor 113 Counter circuit 120 Counter 121 “0” detection detection circuit 122 “1727 "Detection detection circuit 123" 2048 "detection circuit 124" 2339 "detection detection circuit 125, 126 contacts 127 Si signal generation circuit 128 SP signal generation circuit

Claims (2)

[Claims] 1. A reading head comprising a plurality of reading elements arranged in a line in the paper width direction of an original, and for each raster, a plurality of reading elements sequentially synchronizes with a clock signal from one end side of the original. Reading means for reading the original
A read buffer for storing the image data read by the reading means and binarized; an image data coding means for compressing the image data received from the read buffer; and compressed image data received from the image data coding means. In a facsimile apparatus equipped with a transmission buffer for storing and a transmission means for transmitting and outputting the compressed image data received from the transmission buffer via a communication line, an original having a first paper width or a first paper width narrower than the first paper width. Two
Detection means for detecting whether the document has a paper width, counting means for counting the clock signal from "0" to "total number of reading elements-1" for each raster, and outputs of the detection means and the counting means In response to this, the reading means sets and issues a reading start timing when reading a document of the first paper width and a reading start timing when reading a document of the second paper width, and a first command for the reading buffer. Timing setting means for setting and instructing the start and end timings of the image data storage processing when reading the original of the paper width and the start and end timings of the image data storage processing when reading the original of the second paper width. A facsimile device characterized by the above. 2. The timing setting means adds the first signal when the count value of the counting means is a predetermined small first count value, and adds the count number corresponding to the second paper width to the first count value. The second signal at the second count value, the third signal at the third count value obtained by adding the count number corresponding to the first paper width to the first count value, the first paper width and the second paper width. A count value detecting means for outputting a fourth signal at a fourth count value obtained by subtracting a count number corresponding to ½ of the difference from the maximum count value, and receiving the outputs of the detecting means and the count value detecting means, To the reading means, a reading start command signal is output at the time of inputting the first signal when reading a document of the first paper width, and a reading start command signal is issued at the time of inputting the fourth signal when reading a document of the second paper width. A reading start command means for outputting forces, receiving an output of said detecting means and the count value detecting means, first
When reading a document of paper width, when the first signal is input, the storage process of the image data in the read buffer is started, and when the third signal is input, the storage process of the image data is finished, and the document of the second paper width is read. When reading, a data processing start / end command means for starting the storage process of the image data in the read buffer when the first signal is input and ending the storage process of the image data when the second signal is input is provided. The facsimile apparatus according to claim 1.